Primary Causes of Water Pollution in Water-Cooled Chillers

The water system is divided into cooling water and chilled water systems, with the cooling water system primarily relying on cooling towers for heat dissipation. Water in the cooling tower either forms countless droplets or flows in a film-like manner over the packing surface, fully contacting the air. This process introduces a large amount of dust, microorganisms, soluble salts, and corrosive gases into the cooling water, causing the concentration of impurities in the water to continually increase.

Moreover, the continuous evaporation, leakage, and dispersion of water also increase the concentration of impurities. These impurities can be summarized into the following types:

Soluble impurities, such as silt, clay, humus, dust, and plant debris.

2. Soluble impurities, also known as dissolved solids or salt content, exist in water in the form of ions or ion groups, such as Ca2+, Mg2+, Na+, HCO3-, CO32-, SO42-, Cl-, etc.

3. Gaseous Impurities: such as oxygen, carbon dioxide, ammonia, hydrogen sulfide, etc.

Long-term accumulation of impurities in water leads to sedimentation and the formation of scale. The presence of dissolved oxygen in the water also fosters an abundance of algae and bacteria, creating biological sludge. These scales, sludge, and corrosive substances pose serious hazards to the safe operation of water-cooled refrigeration units. Source: Nanjing Mingtong Refrigeration Equipment Co., Ltd.